Machine for cutting spectacle glasses



BAESS@ Aug. 2i, 192:3.

A R. SCHUMANN MACHINE FCR CUTTING SPECTACLE CLASSES Filed Feb. 2, 1921 4Sheets-Sheet 1 Il l Ol r 0 4./ a e v fw Y ug. 2l, i923.

' R. SCHUMANN MACHINE Fon CUTTING -SPECTACLE GLASSES Filed Feb. 2, 19214 Sheets-Sheet 2 Aug. T211, 1923. M6536@ 1 R. SCHUMANN MACHINE FORCUTTING SPECTACLE GLASSES Filed Feb. 2, 1921 4 Sheets-Sheet 5 a@ 355?? 5I L l l *I L U' 'I j) In; I y r y 77, Tn g l 7 l 1 y f 4-' /f'm 0 s i ffi@ 6 1 falli l /6 7? l I -v .l |V l" Lll y/ 5 j IIPII MLU n Hlm 51 Jiavento/q Aug. 2l, 1923. M6536@ R. SCHUMANN MACHINE FOR CUTTING SPECTACLEGLASSES Filed Feb. 2 1921 4 Sheets-Sheet 4 l `mummmrlllrmmuumlllmimnu Vpol O fw shapeofthe said glasslfs obtainedby a Arockingfrnove'inent ofthe glass cutter',lfther glass 1 Patented Aug. 2l, 1923.

nl w i r. A i@ 1 nssiinnonrgeenparig seems ses l www SPECTACLE .GLASSES-.pplication filed. February, 1921. Serial No. 441,809.'

The present invention relates. to a machine for" cutting "spectacleglasses7 in which the cutter being radially inovedf during; the'rotaas-"the Vglass. '-11111 f tion of the'glaissby `nieansoi a crankwhich revolves-iat onefha'lf oflthefangular velocity In the accompanyingdrawings tweeenstructional ornsjof the invention are shown.

seetifongtaken on fthe linelg'lalagpf'ig. 1Q

1F iig-ids a .front elevation ,of anpther coni striic'tionall ferm.

"""FigwL v Y 6 is aseparate `View of they diamond f 11:52; 4Themanually"rotatahleltaldle 4 .attaehedf to wheel 21` isitt'ed' with afacing ot holder;V

flhe gear -wheelsQ andiB `which vare lj ourf nalled`-"in the base-plateVlphave a ratio of rubber er cork 5, onA which `:the glassito be whichis guided'inthe bore of a stationary against :the:littolnwfaceoflascrewf 12 screwing in the upper part of thepillar El' andl adapted-toregulate the tension of the spring A 102i. Bythesaid'spring the rod; 10yis pressed'z downwardly and with thev head'S in engagement witha glassplaced on `.the table 5. lFor.

` 11i'mounted, which isforrned with an up Wardly extending. crank pin?115 engaging in upper 4face ofc' the huh `1.3. QBy means oa screw 17 theslidezll vmaybe shifted, and the-nut 18 on said screw is providedwithn,

f graduation for indicating the degree to wl'ichthe stud 18 is displacedfrom the axis ol ,the wheelln the SlidelSisprOVided a heiizontal.bere,in whichtis ittedan arin 191carryingthe glass cutter, which' is .dis1

placeahle by means of ainutaO. To arm ,19 is attached a sleeve `21,' inwhichl the da` inond holder 22 Tis niovahlyfitted and held by? a spring.23, bearingagainst a knob 24.l The said sleeve is fitted inf'anothersleeve '27 whichtis rockingly pivotedby means of an arni'iyfa overwhichf'plays anfindeX 29' attached toa ringO, which is revolublyiittedon. sleeve 2T, and carries a fork 3 1,1 in `which engages a pinQ on arod 3 3".- This 'Iod isfdisplaceablyfitted in aneye 3 4 attached tothestalti'onary pillar l1. i i

in thefhub oi: wheel 2is a recess 35; intof which engages a :ball 37supportedhy a spring- 36, -whenithe graduation on the table Anothenball58, supported. inthe base p lateQl will, after an arrester 39 and serveasstop thereior by `means 'ofl two recesses V provided thereindiagonally jopposite each other.A

vThe operation in eutting a glass is. as follows:-1 After the graduationon thejtahle has; been set to O the ratio of the: axes eithe ellipse tol be `cut is set by means olf nut '181 andl thereupon by means 1vof nut2Q the length oifftlie greater axis; l The latter. indicated' on thedial 28. Y. glass isthen' clainpedhy swinging the head 8 into theclamping. position linr which it is pressed .downw and hy itsspring andthe glass cutterA is pressed down against the glass.- .New thetablel'lsfturnekl oncer'onnd, until theballl37 again engages into. the recess,38. i i

The lligure cutwilL bethat of a circle if thestud l5 coincides with theaXis ofythe' wlieel,3,-wbecause the slide18 will, in this casefperformno movement. rlhe more eccentrically .the stud 15is set, the'gr'eaterwill be the stroke of the slide 16 andofth glass cutter twice during onerevolution ofwthe glass,` and radially tolthe latter so that an ellipseyis produced.

f It is also possible to cut glasses of a Sickle shape with halfcircular andhalf elliptical outlines, or also withc'ut "out outlines(PDO- 1 has beenfreleased,bearagainst the wheel 27 Y lution of the glassthe ball 38 will engage@ scopic glasses).

For this purpose the ball stop 38 isemployed, as after onehalf revoinits recess whereupon the machine is set for cutting the other halfoutline.

The general constructionv of the modification shown in Figs. 4 and 6 issimilar to that of the example shown in Figs. l to4 3,

and corresponding parts have received similar relerence characters.However, the

glass holding means -and the cutter hold#- ingmeans are lconstructed ina different way.' As shown the head 8 is mounted on acoiled spring 68vattached to an arm 50 and permitting slightmovement of the head 8 inasimilar way as the ball bearings 9 described withreierence to Figs. lto 3.

The arm 50 is connected with a vertical rod` l0 formed with acollar 55and guidedm in a bore of the pillar l1. To the top and bottomV ends ofthe ,said bore screw plugs 54 and l24 respectively are screwed, and theplug 54 is formed internally with a Vertical slot 53 adapted with thehead 8 in glass holding position for engagement with a pin.

52 secured to the rod l0. Between the 'top face of the collar` 55 andthe bottom face of the screw plug 12 a spring-56 is inter- L posed,which tends to force the rod l0 down- Wardly and with the head 8 on theglass placed on the table 4. While the apparatus is out of operation thearm V50 and the headV 8 are inthe position shown in Fig. 4, the pin 52bearing on the top face of the screw plug 54. For holding a blank onthecorkv facing5 of the table the Varm 50 is rocked aboutthe axis of therod l() into position,

with the head 8 axially above the table and the `blank placed thereon,whereupon the spring 56 forces the head 8 into engagement with theblank, the pin 52 engaging in the vertical slot 53.

For obtaining Va better cut with convex` or concave glasses, thediamond, or the d1amond holdershould be, practically, at right angles tothe'surface of the glass being cut.

Y in the head, the latter can be clamped in` Therefore the diamondholder socket 6l is preferably disposed in a head 58 which is adjustablein a slot 59 of the holder 22. The head v58 engages with a ledge 62. ina groove 60 in said slot 59; .By means of a set screw 63 which passesthrough aslot 64 position.

F or cutting the glass the diamond is pressed down against; the glass bymeans of a knob 24itted to the upper end off the holder 22. l

I claim: Y

l. In a machine for cutting spectacle glasses, the combination, with4rotary means :for holding the glass, and means movable toward and fromthe center of said glass holding means for holding the.l glass cutter,of crank mechanism for operating the cutter holding means, andmeansforoperating said glass holdinglmearns and crank mechanism.,

2. In a machine V for cutting spectacle glasses, the coi'nbinatitm,`with rotary means for holding theglass, Aand means movable towards andiromthe center of said glass holding meansfor-holding the glass cutter,of crank mechanism disposed at the side of the glass holding means foroperating the cutter holding means, i and meansfor operating saidglasSholding lmeans and fcrank f mechanism. r; v

8. In .a machine Vvfor cutting spectacle glasses y the combination, withrotary means for fho ding the glass, V and means movable toward and fromthe center of said glassV holdingmeans or'aholdingv thleglass cutter,of--a rotary membercarryingfan operating, member. constructed forVVVmoving .the cutter holding meanstoward andfrom the center of the glassholding means, andxanoperative connectionbetween said glass holdingmeans and rotary Vmember for insuring operation thereof withdiilerentfnumbers of revolutionr. Y .Y l

4; :In a machine. for cutting spectacle. glasses, ythe combination, withrotary means for .holding the glass, and meansaxlovalol@ toward and fromthecenterY otsaid glass holding means for holding the glass cutter, of arotary member carryingan operating member constructed for moving thevcutter holding means toward and from the center of the glass holdingmeans, and an operative :connection .between said glass holding meansand vrotary member for insuringfoperation thereoi` at the ratio of l to2.

glasses, theV combination,gwith rotary means for `holding t-he glass,and means lr'novable Y toward and from the center of said glass holdingmeansfor holding the glass cutter, f of a rotary membercarrying-anoperating' member adjustable radially of the. rotary member andconstructedV forImoVingthe cutter.` holding means toward andffrom thecenter .of the glass holding means and'ianf operative connection`between said A'glass holding meanstand rotary member for in'`suring-operation thereof with Vdifferent num bers of revolution. l

6. In a machine for cutting spectacle glasses,V the combinatiomwithrotary means Yfor holding-the glass, and meanskmovable. toward and fromvthe Acenternof*said glass holdingmeans for .holding the glass cutter,of crank mechanism for operating'thecutter holding means, said crankVmechanism comprising a crank pin which is adjustableitowards and. fromvits axis Yor rotation,-.,and.v means for operating! -s'aid glass holdingmeans and crank mechanism.

7. In -a machineY for cutting spectacle glasses, the combination, withrotary means lao i'or `holding the i glass, and `means lmovable towardAand trom the centerl of said glass holding means 'for holding the`glass cutter,gof.arotary Inemberrdisposed at the side ofthe glassfholding vmeans and carrying an operatingmember adapted to transtormrotary.; movement into reciprocating movement, a connection adjustablein lengthbetween said 'operating member and cutter holding means forsetting the cutter holding means towirdand from the center of theglassholding means, and operating means for said glass holding means androtary member.

8. 1n a machine for cutting spectacle glasses, the combination, withrotary means t'or holding the glass, and means movable toward and fromthe center ot' said glass holding means for holding the glass cutter, ofcrank mechanism Jfor operating the cutter holding means, said crankmechanism comprising a crank pin whichis adjustable toward and from itsaxis of rotation and a connection adjustable in length between saidcrank pin and cutter holding means, and means for operating said glassholding means and crank mechanism.

9. Machine tor cutting spectacle glasses consisting of a base plate, twomeshing gear wheels ot' different diameters, rotatably mounted on saidbase plate, on the larger gear wheel a table for carrying the glass,means for holding the glass on this table, an arm mounted on said baseplate to swing over and toward and from the center of the large gear, aglass cutter mounted in said arm, and means connected to the small gearfor swinging said arm.

10. Machine for cutting spectacle glasses consisting of a base plate,two gear wheels of different diameters rotatably. mounted on said baseplate, a table for thev glass on the larger gear wheel, a liftablepressure device for holding the glass on said table, an arm mounted onsaid base plate to swing over and toward and from the center of thelarge gear wheel, a glass cutter mounted in said arm, means fortransforming the rotary movement off the small gear wheel intoreciprocating movement, and an operative connection adjustable in lengthintermediate said transforming means and glass cutter.

l1. Machine for cutting spectacle glasses consisting of a base plate,two gear wheels journalled thereon, the diameters of said gear wheelsbeing at a ratio of 1:2, a iiange for turning the larger wheel by hand,an elastic support for the glass on the larger gear wheel, a liftableand swivelling presf sure device for holding the glass on the saidsupport. a swivel arm on the base plate, a `glass cutter attached tothis swivel arm, an eccentric stud on the shaft of the smaller gearwheel, means Ator varying the eccentricity of this stud, a connection,adjustable Aarresting the apparatus Vconsisting of a base plate, two

indength `between Lthis ,stud cutter, vand' a stop on thelbase plate forthe larger gear wheel. j

12. Machine for cuttingispectacle glasses, consisting of a base plate,two gearwheels journalledv thereon, the diameters of said gear wheelsat;a "ratio ot 1 2, a flange onY the largergearwheel ior turningit byhand,an elastic support for the glass `on the larger gear wheel,:inelastic pressurerplate .for Vthe glass, `a lii'table arm-` rockinglymounted on said base plate and carrying saidpre'ssure plate andincluding a link having universal connection with said arm and pressureplate, a rocker mounted on said base plate to swing over and toward and'from the center of the large gear wheel, a sleeve rockingly mounted onsaid rocker, a glass cutter guided in said sleeve, a spring tending toretract the glass cutter away from theV glass, a transversely adjustablecrank pin on the small gear wheel, an operative connection between saidcrank pin and arm, automatic means for after one complete rotation otthe gear wheel of larger diameter, and releasable automatic means forarresting the apparatus after a partial rotationV ot the gear wheel oflarger diameter.

13. ln a machine lor cutting spectacle glasses, the combination, withrotary means for holding the glass, and means movable toward and fromthe center of said glass holding means for holding the glass cutter, ofa rotary member disposed at the side of the glass holding means andcarrying an operating member constructed for moving the cutter holdingmeans toward and from the center of the glass holding means, andoperating means for said glass holding means andV rotary member,automatic means for arresting the apparatus after one com plete rotationof the glass holding means, and automatic and releasable means forarresting the apparatus after a partial rotation of the glass holdingmeans.

14. Machine for cutting spectacle glasses gear wheels journalledthereon, the diameters of said gear wheels having a ratio ot 1:2, on thelarger gear wheel a iiange for turning it by hand, an elastic supportfor the glass on the larger gear wheel, an elastic pressure plate forthe glass, a littable spring pressed arm rockingly mounted on said baseplate and carrying said pressure plate and including a link havinguniversal connection with said arm' and pressure plate, a rocker mountedon said base plate to swing over and toward and from the center of thelarge gear wheel, a sleeve rockingly mounted on said rocker, anautomatically retracted glass cutter holder shiftable in said sleeve, aslide adjustable on said smaller gear wheel transversely of the axis ofthe gear wheel, means to indicate the position of said slide and crankpin and the glassV 'alii relatively tothe axis of the small gear Wheel,a connecting member secured, to said sleeve and engaged by the crank pinand made in tWo parts adjustable relatively to veach other for varyingthe length of said connecting member, and means to indicate theadjustment of said connecting member.

` l5.` In `a machine for cutting spectacle glasses, the combination,with rotary means for holding the glass, an arm mounted for swingingover and towardand from the axis of said rotary glassholdngmeans, and Ya glass cutter mounted' in said arm, of a rotarymember disposed at theside. of the glass holding means and carrying an operating memberadaptedto transform rotary ROBERT .soHuMANN

